The Darkin Blade (Aatrox Q)

You touch a greatsword, imbuing it with dark power that causes it to glow with a crimson light. For the duration of the spell, the next three attacks made with the weapon are empowered as follows. Each attack does not require an attack roll; instead, affected creatures must make a Dexterity saving throw. On a failed save, they take full damage (your weapon's damage and the extra damage); on a successful save, they take half damage.

First Attack. You thrust the weapon forward, releasing energy in a 15-foot line originating from you. Each creature in the line takes damage, plus an additional 1d8.
Second Attack. You swing the weapon in an arc, affecting creatures in a 15-foot cone originating from you. Each creature in the area takes damage, plus an additional 2d8.
Third Attack. You drive the weapon into the ground, creating a shockwave that affects all creatures within 5 feet of you. Each creature in the radius takes damage, plus an additional 3d8.

After the third attack, roll a d20. On a roll of 1, the weapon shatters, crumbling into shards.

The damage type matches that of the greatsword. If you do not make all three attacks before the spell ends, the spell's effect dissipates and the weapon returns to its original state.